30420067362721 has 3 divisors (see below), whose sum is σ = 30420072878161. Its totient is φ = 30420061847282.

The previous prime is 30420067362709. The next prime is 30420067362731. The reversal of 30420067362721 is 12726376002403.

The square root of 30420067362721 is 5515439.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 30420067362721 - 2¹⁷ = 30420067231649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30420067362731) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2757720 + ... + 8273158.

Almost surely, 2^{30420067362721} is an apocalyptic number.

30420067362721 is the 5515439-th square number.

30420067362721 is the 2757720-th centered octagonal number.

It is an amenable number.

30420067362721 is a deficient number, since it is larger than the sum of its proper divisors (5515440).

30420067362721 is an frugal number, since it uses more digits than its factorization.

30420067362721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11030878 (or 5515439 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 43.

The spelling of 30420067362721 in words is "thirty trillion, four hundred twenty billion, sixty-seven million, three hundred sixty-two thousand, seven hundred twenty-one".